Freshwater early life growth influences partial migration in populations of Dolly Varden (Salvelinus malma malma)
Abstract Populations of northern Dolly Varden ( Salvelinus malma malma ) exhibit partial seaward migration, yet little is known about this phenomenon in Dolly Varden populations. Our study analyzed data from three different Dolly Varden populations in the western Canadian Arctic in order to determin...
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2021
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crspringernat:10.1007/s00300-021-02870-z 2023-05-15T15:11:33+02:00 Freshwater early life growth influences partial migration in populations of Dolly Varden (Salvelinus malma malma) Morrison, Christie M. Gallagher, Colin P. Tierney, Keith B. Howland, Kimberly L. Fisheries and Oceans Canada Inuvialuit Final Agreement Implementation Funds Gwich’in Implementation Funds Polar Continental Shelf Program DFO Strategic Program for Ecosystem-Based Research and Advice Natural Sciences and Engineering Research Council of Canada Northern Scientific Training Program UAlberta North 2021 http://dx.doi.org/10.1007/s00300-021-02870-z https://link.springer.com/content/pdf/10.1007/s00300-021-02870-z.pdf https://link.springer.com/article/10.1007/s00300-021-02870-z/fulltext.html en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Polar Biology volume 44, issue 7, page 1353-1364 ISSN 0722-4060 1432-2056 General Agricultural and Biological Sciences journal-article 2021 crspringernat https://doi.org/10.1007/s00300-021-02870-z 2022-01-04T15:00:59Z Abstract Populations of northern Dolly Varden ( Salvelinus malma malma ) exhibit partial seaward migration, yet little is known about this phenomenon in Dolly Varden populations. Our study analyzed data from three different Dolly Varden populations in the western Canadian Arctic in order to determine if: (1) differences in size-at-first seaward migration exist between fish that migrate at early and late ages among populations inhabiting different river systems, and (2) annual growth influences anadromous or resident life history choice. Otolith strontium analysis and back-calculation were used to determine age- and size-at-first seaward migration, respectively. Differences in age- and size-at-first seaward migration were determined across river system and migration age. Back-calculated fish lengths were compared using a mixed effect model to determine how early growth influences migratory tactics (early or late aged smolt, or resident). Our results indicate that fish exhibiting faster early growth migrated in earlier years and at smaller sizes than slower growing fish, however size- and age-at first seaward migration varied by river system. Faster growing Dolly Varden tended to become either residents or early smolts, while slower growth was associated with smolting later in life. This is contrary to life history theory where the fastest growing fish in a population should mature as a resident. Our results indicate factors other than growth may be influencing life history ‘decisions’ in Dolly Varden. Future work on growth efficiencies and metabolic rates is needed to assess how they affect migratory behaviours. Article in Journal/Newspaper Arctic Polar Biology Springer Nature (via Crossref) Arctic Varden ENVELOPE(7.656,7.656,62.534,62.534) Polar Biology 44 7 1353 1364 |
institution |
Open Polar |
collection |
Springer Nature (via Crossref) |
op_collection_id |
crspringernat |
language |
English |
topic |
General Agricultural and Biological Sciences |
spellingShingle |
General Agricultural and Biological Sciences Morrison, Christie M. Gallagher, Colin P. Tierney, Keith B. Howland, Kimberly L. Freshwater early life growth influences partial migration in populations of Dolly Varden (Salvelinus malma malma) |
topic_facet |
General Agricultural and Biological Sciences |
description |
Abstract Populations of northern Dolly Varden ( Salvelinus malma malma ) exhibit partial seaward migration, yet little is known about this phenomenon in Dolly Varden populations. Our study analyzed data from three different Dolly Varden populations in the western Canadian Arctic in order to determine if: (1) differences in size-at-first seaward migration exist between fish that migrate at early and late ages among populations inhabiting different river systems, and (2) annual growth influences anadromous or resident life history choice. Otolith strontium analysis and back-calculation were used to determine age- and size-at-first seaward migration, respectively. Differences in age- and size-at-first seaward migration were determined across river system and migration age. Back-calculated fish lengths were compared using a mixed effect model to determine how early growth influences migratory tactics (early or late aged smolt, or resident). Our results indicate that fish exhibiting faster early growth migrated in earlier years and at smaller sizes than slower growing fish, however size- and age-at first seaward migration varied by river system. Faster growing Dolly Varden tended to become either residents or early smolts, while slower growth was associated with smolting later in life. This is contrary to life history theory where the fastest growing fish in a population should mature as a resident. Our results indicate factors other than growth may be influencing life history ‘decisions’ in Dolly Varden. Future work on growth efficiencies and metabolic rates is needed to assess how they affect migratory behaviours. |
author2 |
Fisheries and Oceans Canada Inuvialuit Final Agreement Implementation Funds Gwich’in Implementation Funds Polar Continental Shelf Program DFO Strategic Program for Ecosystem-Based Research and Advice Natural Sciences and Engineering Research Council of Canada Northern Scientific Training Program UAlberta North |
format |
Article in Journal/Newspaper |
author |
Morrison, Christie M. Gallagher, Colin P. Tierney, Keith B. Howland, Kimberly L. |
author_facet |
Morrison, Christie M. Gallagher, Colin P. Tierney, Keith B. Howland, Kimberly L. |
author_sort |
Morrison, Christie M. |
title |
Freshwater early life growth influences partial migration in populations of Dolly Varden (Salvelinus malma malma) |
title_short |
Freshwater early life growth influences partial migration in populations of Dolly Varden (Salvelinus malma malma) |
title_full |
Freshwater early life growth influences partial migration in populations of Dolly Varden (Salvelinus malma malma) |
title_fullStr |
Freshwater early life growth influences partial migration in populations of Dolly Varden (Salvelinus malma malma) |
title_full_unstemmed |
Freshwater early life growth influences partial migration in populations of Dolly Varden (Salvelinus malma malma) |
title_sort |
freshwater early life growth influences partial migration in populations of dolly varden (salvelinus malma malma) |
publisher |
Springer Science and Business Media LLC |
publishDate |
2021 |
url |
http://dx.doi.org/10.1007/s00300-021-02870-z https://link.springer.com/content/pdf/10.1007/s00300-021-02870-z.pdf https://link.springer.com/article/10.1007/s00300-021-02870-z/fulltext.html |
long_lat |
ENVELOPE(7.656,7.656,62.534,62.534) |
geographic |
Arctic Varden |
geographic_facet |
Arctic Varden |
genre |
Arctic Polar Biology |
genre_facet |
Arctic Polar Biology |
op_source |
Polar Biology volume 44, issue 7, page 1353-1364 ISSN 0722-4060 1432-2056 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1007/s00300-021-02870-z |
container_title |
Polar Biology |
container_volume |
44 |
container_issue |
7 |
container_start_page |
1353 |
op_container_end_page |
1364 |
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1766342397123362816 |